Skip to content

CKA Questions I need to spend more time on

Taints and Tolerations

Create another pod named bee with the nginx image, which has a toleration set to the taint mortein.

Struggled

This is a question I struggled on

kubectl run bee --image=nginx --dry-run=client -o yaml > bee.yaml

Edit the file and add the below

apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: bee
  name: bee
spec:
  containers:
  - image: nginx
    name: bee
    resources: {}
  tolerations:
  - key: "spray"
    operator: "Equal"
    value: "mortein"
    effect: "NoSchedule"
  dnsPolicy: ClusterFirst
  restartPolicy: Always
status: {}

Which nodes can the pods for the blue deployment be placed on?

Struggled

This is a question I struggled on

kubectl describe nodes/controlplane | grep -i taints

I made the assumption that we can simply look at the roles of the nodes

Check if controlplane and node01 have any taints on them that will prevent the pods to be scheduled on them. If there are no taints, the pods can be scheduled on either node. So run the following command to check the taints on both nodes. 

kubectl describe node controlplane | grep -i taints
kubectl describe node node01 | grep -i taints

Want to make this site better? Open a PR or help fund hosting costs